-- A Better Vision Seminar will be held from 3 to 5 p.m. Saturday at the Osceola County Stadium Clubhouse, 1000 Osceola Boulevard, Kissimmee. The topic will be ''Cataracts: Fiction and the Facts.'' Dr. Mitchell Shapiro and Dr. John L. Isler, co-medical directors of Florida Eye Clinic, will be guest speakers. Clinic staff will give free cataract screening exams. Admission is free.